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Tuesday, 18 September 2007

doublet. A composite assembled stone usually of two parts, crown and pavilion, cemented or fused


together. diamond doublet has a diamond top and pavilion of syn­thetic colorless sapphire or spinel, quartz, glass, or rarely diamond; usually is closed set. Other simulants include doublets of almandine garnet tops with glass pavilions, or synthetic colorless sapphire or spinel crowns and strontium titanate bottoms. See

DIAMOND DOUBLET.

 
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